Core-bar support



June 17, 1930. I McwANE CORE BAR SUPPORT Filed Aug. 50. 1927 INVENTOR, JamesBJfcWarza,

2Q, I A'i'TORNEYS Patented June 17, 1930 [UNITED srArasl mesa eerie JAMES B. MCWANE, OF BIRMINGHAM, ALABAMA, ASSICHTOZR. T0 MGWANE CAST IRON PIPE COMPANY, OF BIRMINGHAM, ALABAMA, A CORPORATION OF ALABAMA Conn-Baa snrrosr Application filed August 30, 1927. Serial No. 218,467.

In making cores for pipes and the like heretofore, the journals in which the core bars revolve have been as near the ends of the core bars as possible. My Reissue No. 17,121 describes a drag section of a pipe flask having a machined journal, in which the core bar rests and by which it is centered. I have found by experience that it is desirable, during formation of the core, to have the journal of the core bar at ap proximately the point Where the core bar is to rest in the flask journal, because if the core bar should be slightly bent, and the journal used in the making of the core is some distance from the point where the core bar rests in the flask journal, the core will be out of center with reference to the mold, resulting in the casting of defective pipe.

This invention obviates difficulties previously encountered in properly making cores by providing means for holding the core bars against longitudinal movement in the process of making, and a rotary support for the core bars which provides a journal therefor at approximately the point where the core bars rest in the flask journal.

In the accompanying drawings showing a preferred embodiment of the invention:

Fig. 1 is an elevation of the improved core bar support for use in forming the core, showing the core bar in dotted lines, and likewise indicating the sand core formed thereon;

Fig. 2 is a plan View of the same, showing the core knife;

Fig. 3 is an end elevation, viewed from the left end of Figs. 1 and 2; and

Fig. 4 is a similar view, looking from the right end of Figs. 1 and 2.

Referring more specifically to the drawings, there is shown a plurality of standards 5 which represent any form of fixed support, and which may be considered as being located directly beneath the sand spout of a core making machine (not shown), for instance, the machine shown in my application, Serial No. 259,529. Se-

cured to the standards 5 isa core knife 6,

by which the core 7 is shaped on the core bar 8.

For rotatably supporting the core bar, two sets of rollers 9, 10 are provided, each set consisting of two rollers mounted on anti-friction bearings (not shown) and properly a-lined and located so that the core bars may be rotated rapidly on their longitudinalaxes, with the entire weight of the core bar carried by said rollers. To permit exact alinement' ofv the rollers 9, 10 for true axial rotation of the core bars, said rollers are carried on frames 11, 12 which are slidable onzthe standards laterally relative to the'core bars, and are adjustable by means of'set screws 13 on opposite sides, bearing against the ends of the frames.

To prevent any longitudinal movement of the core bars while supported on the rollers 9, l0, a set of rollers 14 is provided, each engaging an annular core bar flange 15 accurately machined "on all surfaces. As shown, there are two rollers 14 on an ad-. justable frame 16, each roller having two marginal flanges 17 whichengage opposite side faces of the core bar fiange'l5. The frame 16, as best shown in Fig. 2, is ad justable either longitudinally or laterally relativeto the core bar, respectively by the set screws 18, 19. pTlie desired adjustment, as shown in Fi s. 3 and 1', causes the rollers 14 to be out or contact'with the periphery of'the core bars, but in close contact with the side faces of the flange 15. Thus rollers 14 do not support any part of the weight of the core bars, but make impossible any longitudinal movement thereof; and as the rollers 9 and '10 support the core bar at or very close to the points where it rests in the flask journals, as described in' said resis'sue, the forming of the core 'true to' its final rest-i ing placei n the .flask is made possible. 1 7 Obviously the present invention is not restricted to the particular embodimentthereof herein shown and described. Moreover, it is not indispensable that all the features of the invention 'be used conjointly, since they may be employed advantageously hat I claim 1. A'core'bar support comprising, incoinbination, two sets of rollers for rotatably various combinations and sub-combinations.

Res

supporting the core bar; and another set of rollers engaging the core bar to prevent any longitudinal movement thereof While supported by said tWo sets of rollers.

2 A core bar support comprising, in combination, two sets of rollers for rotatably supporting the core bar; and another set of fiangedrollers engaging an annular flange on the core bar to prevent any longitudinal movement thereof While supported by said tWo sets of rollers.

- 3. The combination with a core bar, anda support therefor constructed and arranged to permit rotation of the core bar for forming of the core, said support including rollers engaging and supporting the core bar at approximately the points Where the core bar rests in thefiask'journals; and means preventing longitudinal movement ofthe core bar When engaged by said rollers, thereby making possible the forming of the core true to its final resting place in the flask.

4. The combination With a core bar, and supporting rollers therefor constructed and arranged to'perinit rotation of the core bar for forming of the core, said rollers support: ing the core barat approximately the points Where the core bar rests in theflaslr journals, of a pair of rollers rotatable on axes para'lllel to the longitudinal axis of the core bar, placed underneath the core bar, and each hav ing two straight marginal flanges; the core bar having an annular flange fitting the spaces between the flanges of the rollers but not resting on the rollers, so that longitu dinal movement of the core bar during form ation of the core is impossible, thus metaing the formation of the core true to its final resting place'in the flask.

5. A core bar support'comprising, in combination, rollers for carryingthe Weight of the core bar and so located' that two oftlie rollers-support the core bar approximately at the point Where the'eore bar rests on the flask journal; and means for preventing any longitudinal movement of the core bar While on the rollers.

weight of the core ban 7. A eore bar support comprising, in combination, means for carrying the weight of the core bar; "rollers engaging said. core bar directly and constructed and arranged to prevent any longitudinalmovement of the core bar While on thefsupportysaid rollers carrying no partof the Weight of the core bar, and means for adjusting the position of the rollers relative to the core bar.

8. A core bar support comprising, in COmne e t m an f Carrying, h W ight 6f ture.

' J AMES R. MoWANE. 

